XENSND_OP_HW_PARAM_QUERY 68 sound/xen/xen_snd_front.c req = be_stream_prepare_req(evtchnl, XENSND_OP_HW_PARAM_QUERY); XENSND_OP_HW_PARAM_QUERY 60 sound/xen/xen_snd_front_evtchnl.c case XENSND_OP_HW_PARAM_QUERY: